A187663 a(0) = 1, a(n) = least primorial sharing at least n distinct digits with a(n-1).

1, 210, 2310, 223092870, 6469693230, 200560490130, 304250263527210, 614889782588491410, 32589158477190044730, 1922760350154212639070, 117288381359406970983270

Offset

0,2

Comments

The sequence ends with the smallest pandigital primorial, which is 61# = 117288381359406970983270 (18th primorial).

If you change the criterion from "at least n distinct" to "all" the sequence becomes 1, 210, 2310, 200560490130, 1922760350154212639070, 117288381359406970983270.

Links

Table of n, a(n) for n=0..10.

Example

a(1) = 210 = 7#, which shares the "1" with a(0).
a(2) = 2310 = 11#, which shares more than the needed two digits with 210, namely "0", "1", and "2".
a(3) = 223092870 = 23#.

Crossrefs

Cf. A002110.

Sequence in context: A371111 A371053 A135201 * A064260 A027806 A024407

Adjacent sequences: A187660 A187661 A187662 * A187664 A187665 A187666

Keyword

nonn,base,easy,fini,full

Author

Jonathan Vos Post, Mar 12 2011

Status

approved